<SEC-DOCUMENT>0001808665-21-000005.txt : 20210212
<SEC-HEADER>0001808665-21-000005.hdr.sgml : 20210212
<ACCEPTANCE-DATETIME>20210212180355
ACCESSION NUMBER:		0001808665-21-000005
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20210210
FILED AS OF DATE:		20210212
DATE AS OF CHANGE:		20210212

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Peisert Daniel A.
		CENTRAL INDEX KEY:			0001758376

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-39294
		FILM NUMBER:		21630510

	MAIL ADDRESS:	
		STREET 1:		C/O ASSERTIO THERAPEUTICS, INC.
		STREET 2:		100 SOUTH SAUNDERS ROAD, SUITE 300
		CITY:			LAKE FOREST
		STATE:			IL
		ZIP:			60045

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Assertio Holdings, Inc.
		CENTRAL INDEX KEY:			0001808665
		STANDARD INDUSTRIAL CLASSIFICATION:	PHARMACEUTICAL PREPARATIONS [2834]
		IRS NUMBER:				850598378
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		100 S. SAUNDERS ROAD
		STREET 2:		SUITE 300
		CITY:			LAKE FOREST
		STATE:			IL
		ZIP:			60045
		BUSINESS PHONE:		(224) 419-7106

	MAIL ADDRESS:	
		STREET 1:		100 S. SAUNDERS ROAD
		STREET 2:		SUITE 300
		CITY:			LAKE FOREST
		STATE:			IL
		ZIP:			60045
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_161317101365578.xml
<DESCRIPTION>FORM 4
<TEXT>
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    <periodOfReport>2021-02-10</periodOfReport>

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    <issuer>
        <issuerCik>0001808665</issuerCik>
        <issuerName>Assertio Holdings, Inc.</issuerName>
        <issuerTradingSymbol>ASRT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001758376</rptOwnerCik>
            <rptOwnerName>Peisert Daniel A.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ASSERTIO HOLDINGS, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>100 SOUTH SAUNDERS ROAD, SUITE 300</rptOwnerStreet2>
            <rptOwnerCity>LAKE FOREST</rptOwnerCity>
            <rptOwnerState>IL</rptOwnerState>
            <rptOwnerZipCode>60045</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President and CEO</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

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                <value>Common Stock</value>
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                <transactionCode>M</transactionCode>
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                <transactionPricePerShare>
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                <transactionPricePerShare>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Performance Shares</value>
            </securityTitle>
            <conversionOrExercisePrice>
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            <transactionDate>
                <value>2021-02-10</value>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>4087</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                    <footnoteId id="F4"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2021-02-10</value>
            </exerciseDate>
            <expirationDate>
                <value>2021-02-10</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>4087.0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
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            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
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        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Units</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F5"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2021-02-11</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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            <transactionAmounts>
                <transactionShares>
                    <value>1834863</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                    <footnoteId id="F4"/>
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                <transactionAcquiredDisposedCode>
                    <value>A</value>
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            <exerciseDate>
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            </exerciseDate>
            <expirationDate>
                <value>2024-02-11</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1834863.0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1834863</value>
                </sharesOwnedFollowingTransaction>
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        </derivativeTransaction>
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            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F7"/>
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            <transactionDate>
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            </transactionDate>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>M</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
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                <transactionShares>
                    <value>27587</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                    <footnoteId id="F4"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
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            <exerciseDate>
                <footnoteId id="F8"/>
            </exerciseDate>
            <expirationDate>
                <value>2022-02-12</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>27587.0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
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                <sharesOwnedFollowingTransaction>
                    <value>27588</value>
                </sharesOwnedFollowingTransaction>
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                    <value>D</value>
                </directOrIndirectOwnership>
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        </derivativeTransaction>
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    <footnotes>
        <footnote id="F1">Represents shares of common stock withheld for payment of taxes upon the vesting of performance shares.</footnote>
        <footnote id="F2">Represents shares of common stock withheld for payment of taxes upon the vesting of restricted stock units.</footnote>
        <footnote id="F3">Each performance share represents the contingent right to receive one share of common stock. This transaction represents the settlement of vested performance shares in shares of common stock.</footnote>
        <footnote id="F4">The derivative securities were granted to the reporting person, and were not sold to the reporting person. As such, the reporting person did not pay any consideration for the derivative securities.</footnote>
        <footnote id="F5">Each restricted stock unit represents a contingent right to receive one share of the registrant's common stock.</footnote>
        <footnote id="F6">One-third of these restricted stock units are scheduled to vest on each of February 11, 2022, 2023 and 2024, assuming continued employment through the applicable vesting date.</footnote>
        <footnote id="F7">Each restricted stock unit represents the contingent right to receive one share of common stock. This transaction represents the settlement of vested restricted stock units in shares of common stock.</footnote>
        <footnote id="F8">One-third of these restricted stock units are scheduled to vest on each of February 12, 2020, 2021 and 2022.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Jennifer Hipelius, attorney-in-fact for Daniel A. Peisert</signatureName>
        <signatureDate>2021-02-12</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
